Circulator.



N. M. LA FORTE.

CIRCULATOR APPLICATION FILED SEPT. l. l9l5.

Patented Jan. 28,1919.

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APPLICATIONFILED saw. 1. 1915.

Patented Jan 28,1919

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NORBERT M. LA PORTE, OF BALTIMORE, MARYLAND, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE MOTOR COOLING SYSTEMS COMPANY, A CORPORATION OF DELA- WARE. I,

To all whom it may concern:

Be it known that I, NORBERT M. LA PoR'rE, a citizen of the United States of America, residing in the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Circulators, of which the following is a specification.

This invention relates to a circulating device for the cooling water used in connection with internal combustion engines to prevent overheating of the cylinder walls. While this apparatus may be applied to the various types of internal combustion engines, as marine and stationary, as well as to those used to propel road vehicles, it is illustrated as applied to an automobile engine.

The circulator operates in a manner similar in some ways to that of the device described in my U. S. Patent No. 1,138,962, issued May 11, 1915. The principle of operation consists in leading a portion of the exhaust gases to a nozzle in the circulating system which is disposed in the direction of circulation. The exhaust gases escaping from the nozzle impart velocity to the water and serve most efliciently as a means for assisting circulation, the effect of which varies to correspond to the heating effect.

In the previous embodiments of my invention, it has been necessary to lead a portion of the exhaust gases by way of an outside pipe from the exhaust manifold to the lower radiator connection but I find that I can dispense with all, or the greater portion of the gas pipe by placing the nozzle in the cylinder head where it is directed toward the top radiator connection. In this way the structure is cheapened and simplified.

The circulating device consists in means for leading a portion of the exhaust gases into the circulating system and a nozzle for discharging them in the direction of thermosiphonic circulation, together with means for preventing back flow of water to the exhaust pipe and engine cylinder. The invention resides in the adaptation of this device, described herein, and particularly in the provision of a nozzle in the cylinder head, and in the preferred embodiment, the exhaust gases are led to the nozzle by a passage which extends through the interior of the casting and the non-return valve referred to is seated in the cylinder head or cylinder casting so that, using the preferred form of Specification of Letters Patent.

CIRCULATOR.

Patented Jan. 28, 1919.

Application filed September 1, 1915. Serial No. 48,386.

the invention, the circulating device may be applied tothe motor without external evidence of its presence.

In the accompanying drawing I have illustrated so much of an internal combustion engine to which the device of my invention has been applied as is necessary to a full understanding of the invention.

Figure l is an elevation and partial section of a cylinder casting and head showing the nozzle, the passage leading thereto from the exhaust space and the non-return valve;

Fig. 2 is an elevation of an entire engine, radiator. etc., showing the alternative form of the invention, a portion of the cylinder head being brokenaway for added clearness of illustration;

Fig. 3 is a detail view of the preferred form of the invention; and

Fig. 4: shows the manner of connecting the gas pipe to the exhaust manifold in the secondary form of the invention, and also the non-return valve in said pipe.

Referring to the drawing by numerals, there is a cylinder head casting 1, a cylinder casting 2, inlet passage 3, exhaust passage 4, radiator 5, top radiator connection 6, exhaust manifold 7 and inlet manifold 8, the parts being arranged to give thermosiphonio circulation.

In Fig. 1, I have shown a nozzle 9 projecting into the water jacket 19 and discharging in the direction of thermosiphonic circulation, as indicated by the arrows. The nozzle or pipe forming the shank thereof has a screw threaded shoulder or enlarged portion 10 engaging a threaded aperture 11 in an internal partition or wall 12 in the cylinder casting. As shown, this is the top wall of the combustion chamber 13. The opening 14 at the end of the pipe or shank 15 of the nozzle, registers with a hole or passage 16, see Fig. 1, bored in the cylinder casting and leading to the exhaust passage 4, beyond the exhaust valve seat at. The shank of the nozzle, as shown in Fig. 8, is provided with a non-return valve 17 of any suitable construction. As illustrated, it has a body portion 18 including a seat which is threaded into the end of the pipe 15. The pipe or shank of the nozzle is shown as vertically placed, the discharge end or nozzle proper 9 being bent at right angles so that it may be turned forward in the direction of circulation.

To apply this device, the cylinder head is removed and a tapped hole 11 made in the cylinder head casting. The nozzle is then seated therein and the end of the shank brought to a level with the bottom surface of the casting, the hole 16 is bored in the cylinder casting proper, a suitablegasket20 is provided, the contacting parts are shellacked, and when the cylinder head is re placed and fastened in position, the opening 14 registers with the holes 16 and the connections are complete so that at each pulsa: tion of the exhaust in the passage 4:, a portion of the exhaust will escape throughthe nozzle into the cooling water and impart its velocity to the current which is flowing forward in the jacket space at the cylinder head, thus assisting the thermosiphonic fioW set up by the difference in temperature of the different parts in the system.

Referring now particularly to Figs. 2 and 4, the secondary form of the invention as illustrated includes a nozzle 21 having the apex or discharge end 22 bent at right angles to the shank or butt end 28. This nozzle has a shoulder or enlarged portion 24, threaded to engage a threaded aperture 25 in the top wall of the water jacket of, the cylinder head 1. This nozzle 21 is connected by-a pipe 26 to a short threaded pipe end 27 which engages a tapped hole 28 in the manifold 7 a non-return valve 29 of any suitable type being embodied in the connection near the manifold.

The operation of this device is similar to that of the firm form and has been fully statedin connection With the above description and preamble.

I have thus described specifically and in detail two forms of my invention in order that the nature and operation of the device may be fully understood; however, the spe cific terms herein are used in their descriptive rather than in their limiting sense and the scope of the inventioni-s defined inthe claims:

1. A cylinder head casting having a cooling-water space, a nozzle therein turned in the direction of the water circulation, and means for connectingthenozzle to the exhaust of the, engine.

2. In an internal combustion engine a water jacket, a nozzle therein turned in the direction of circulation and an internal passage leading from the exhaust to the nozzle.

3. A cylinder head casting having a cooling water space, a nozzle therein turned in the direction of the water circulation, a passage connecting the nozzle to the exhaust of the engine, anda non-return valve in said passage.

Signed by ,me at Baltimore, Maryland, this 31st day of August, 1915. v

NO-RBERT M. LA FORTE.

Witnesses: 1

EDWARD L. BASH, EDWIN F. SAMUELs,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

